Problems

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Name   Total Acc. Ratio Fastest Total Acc. Ratio Difficulty
0-1 Sequences 5017 749 15% 0.01 984 510 52% 6.9
10 Kinds of People 8636 1780 21% 0.01 1523 1043 68% 5.1
2048 5404 2579 48% 0.00 2454 2107 86% 2.1
3D Printed Statues 4632 2236 48% 0.00 2122 1903 90% 2.0
3D Printer 419 95 23% 0.00 151 76 50% 7.6
3-Sided Dice 1597 121 8% 0.00 252 92 37% 8.7
4 thought 5105 1729 34% 0.00 1729 1442 83% 2.8
A1 Paper 3501 1028 29% 0.00 1008 792 79% 3.6
Aaah! 17632 8449 48% 0.00 7538 7005 93% 1.6
Abandoned Animal 1064 201 19% 0.03 238 174 73% 4.9
ABC 6440 2970 46% 0.00 2868 2599 91% 1.9
Above Average 3394 1420 42% 0.00 1471 1315 89% 2.1
A+B Problem 4858 493 10% 0.03 718 246 34% 8.1
A Brief Gerrymander 116 26 22% 0.15 28 18 64% 7.3
Abstract Art 201 51 25% 0.00 50 37 74% 5.4
Absurdistan Roads II 488 174 36% 0.00 168 113 67% 6.8
Absurdistan Roads III 1204 316 26% 0.02 302 224 74% 5.8
Access Points 79 30 38% 0.02 38 27 71% 5.5
A Classy Problem 5680 1527 27% 0.01 1291 1001 78% 4.3
ACM Contest Scoring 4534 2845 63% 0.00 2499 2365 95% 1.5
Adding Words 6212 1440 23% 0.00 1461 1122 77% 3.5
A Different List Game 5200 358 7% 0.00 632 126 20% 9.1
A Different Problem 19382 7557 39% 0.00 7004 6083 87% 2.2
Adjoin the Networks 1374 364 26% 0.00 322 247 77% 5.9
Administrative Difficulties 587 132 22% 0.03 166 105 63% 6.5
Advanced Causal Measurements 36 12 33% 0.10 14 12 86% 5.9
Adventure Begins 128 39 30% 0.06 48 36 75% 4.4
Adventures in Moving -- Part IV 626 197 31% 0.00 183 156 85% 4.6
A Favourable Ending 1036 257 25% 0.00 251 176 70% 4.9
A Feast For Cats 1202 428 36% 0.19 298 242 81% 4.8
Air Conditioned Minions 2893 805 28% 0.00 885 652 74% 4.4
Airline Hub 1416 246 17% 0.01 281 153 54% 7.0
Airport Coffee 683 146 21% 0.09 138 105 76% 6.6
Airport Construction 2628 344 13% 0.02 274 142 52% 7.3
Airport Logistics 45 10 22% 0.00 16 10 62% 7.7
Airports 264 82 31% 0.13 77 58 75% 5.6
Akcija 4102 1788 44% 0.00 1610 1411 88% 2.1
Aladin 711 67 9% 0.10 108 20 19% 8.9
Alchemy 93 14 15% 0.03 26 14 54% 8.0
Alea iacta est 29 11 38% 0.34 14 11 79% 6.9
Alice in the Digital World 1668 436 26% 0.01 470 361 77% 4.0
Alien Codebreaking 40 5 12% 3.23 12 3 25% 8.6
Alien Numbers 1587 816 51% 0.00 801 719 90% 2.1
A List Game 5520 1644 30% 0.00 1582 1322 84% 3.0
All about that base 2384 937 39% 0.00 899 754 84% 2.9
All Different Directions 779 347 45% 0.00 319 279 87% 2.6
Allergy Test 307 103 34% 0.00 96 53 55% 8.1
All Friends 751 143 19% 0.00 127 64 50% 9.0
All Just A Dream 1136 254 22% 0.05 193 138 72% 6.2
All Pairs Shortest Path 5951 1036 17% 0.02 705 490 70% 5.7
Almost Perfect 4452 1019 23% 0.00 1105 860 78% 3.7
Almost Union-Find 4602 780 17% 0.02 712 386 54% 6.7
Alphabet 710 361 51% 0.00 373 318 85% 2.9
Alphabet Spam 4843 3109 64% 0.00 2367 2277 96% 1.4
Alternative Bracket Notation 190 79 42% 0.00 83 69 83% 5.3
Altruistic Amphibians 243 60 25% 0.24 62 41 66% 5.9
Amalgamated Artichokes 3073 1388 45% 0.01 1234 1073 87% 2.6
Amanda Lounges 1143 314 27% 0.03 281 218 78% 5.7
A Mazing! 1257 309 25% 0.09 150 112 75% 5.2
Amazing Adventures 57 20 35% 0.03 20 14 70% 7.0
Amazing Race 257 67 26% 0.39 74 54 73% 6.3
Ambiguous Result 195 45 23% 0.03 68 43 63% 7.5
Amsterdam Distance 907 358 39% 0.00 407 323 79% 2.8
A Multiplication Game 323 80 25% 0.00 109 76 70% 5.7
Anagram Counting 2309 888 38% 0.00 867 714 82% 3.2
Andrew the Ant 213 57 27% 0.06 71 53 75% 5.0
A New Alphabet 7861 3572 45% 0.00 3360 3108 92% 1.8
An I for an Eye 65 25 38% 0.00 31 25 81% 5.0
Animal Classification 1257 264 21% 0.03 254 159 63% 6.9
An Industrial Spy 1237 639 52% 0.02 499 426 85% 3.2
Another Brick in the Wall 1693 885 52% 0.00 868 789 91% 2.0
Another Candies 5625 1508 27% 0.00 1580 1295 82% 2.9
Another Dice Game 80 59 74% 0.00 51 48 94% 3.4
Another Query on Array Problem 1071 136 13% 0.05 240 99 41% 7.7
Anthony and Cora 625 156 25% 0.00 187 127 68% 5.7
Anthony and Diablo 1549 545 35% 0.00 604 519 86% 2.5
Antiarithmetic? 912 157 17% 0.01 222 113 51% 7.6
Ants 2152 1000 46% 0.00 774 688 89% 2.2
Apaxiaaaaaaaaaaaans! 8066 4968 62% 0.00 4493 4308 96% 1.3
Apparatus 581 151 26% 0.01 114 87 76% 5.4
Apple Market 431 87 20% 0.07 97 53 55% 7.3
Apples, Cherries, and Mangos 350 109 31% 0.02 102 78 76% 5.9
Aquarium Tank 356 105 29% 0.00 94 74 79% 5.5
Aqueduct Construction 127 43 34% 0.01 36 30 83% 6.4
A Question of Ingestion 794 187 24% 0.00 188 138 73% 5.7
Arable Area 230 53 23% 0.04 54 33 61% 8.1
Arachnophobia 214 62 29% 0.14 57 45 79% 4.8
A Random Problem 68 18 26% 0.00 21 15 71% 7.6
A Rational Sequence 1111 361 32% 0.00 404 285 71% 5.2
A Rational Sequence 2 1257 913 73% 0.00 843 802 95% 1.6
A Rational Sequence (Take 3) 543 461 85% 0.00 347 339 98% 1.7
Arbitrage? 1691 335 20% 0.02 245 196 80% 3.6
Arcade! 1114 200 18% 0.01 192 137 71% 6.3
Arctic Network 1114 399 36% 0.00 339 271 80% 4.5
A Real Challenge 5167 2492 48% 0.00 2418 2266 94% 1.6
Area of Effect 82 9 11% 3.16 15 7 47% 8.0
Are You Listening? 173 49 28% 0.00 49 46 94% 3.1
Arithmetic 1857 533 29% 0.00 548 426 78% 3.7
Army Strength (Easy) 2628 1344 51% 0.00 1214 1099 91% 1.9
Army Strength (Hard) 3205 1653 52% 0.01 1165 1041 89% 2.2